{"product_id":"6845-4125-392-6-4-small-block-mopar-hemi-gen-iii-fx-series-18cc-dish-top-gen-iii-hemi-forged-piston-set-4-125-inch-bore-pin-dia-0-927-comp-height-1-21","title":"DSS Racing FX Series Forged Piston Set 4.125\" Bore: Chrysler \/ Dodge \/ Jeep \/ Ram 6.4L 392 (All)","description":"\u003ch3\u003eDSS Racing FX Series Forged Piston Set\u003c\/h3\u003e\u003cp\u003eFits Most Chrysler \/ Dodge \/ Jeep \/ Ram 6.4L 392 Models\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6845-4125C \/ 2-6845-4125C \/ 3-6845-4125C \/ K1-6845-4125C \/ K2-6845-4125C \/ K3-6845-4125C\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing FX Series Forged Piston Set is engineered specifically for the Chrysler, Dodge, Jeep, and Ram 6.4L 392 HEMI engines. Designed to fit most 6.4L 392 models, these pistons offer a reliable upgrade for enthusiasts seeking enhanced durability and performance. Crafted to meet the demanding conditions of high-performance and street applications, this piston set provides improved strength and thermal resistance compared to stock cast pistons.\u003c\/p\u003e\u003cp\u003eIdeal for builders and tuners working on the 398 Small Block Mopar HEMI Gen III platform, these pistons accommodate a 4.125\" bore and are optimized for a 3.720\" stroke with a 6.2\" rod length. Whether you are rebuilding or upgrading your engine, the DSS Racing FX Series pistons deliver precision fitment and consistent performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese forged pistons incorporate advanced design elements to ensure durability and efficiency under high-stress conditions. Key features include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eForged construction for superior strength and fatigue resistance\u003c\/li\u003e\n\u003cli\u003eCompensated height of 1.21\" for optimal piston-to-deck clearance\u003c\/li\u003e\n\u003cli\u003e18cc dish top design to control compression and support various combustion chamber volumes\u003c\/li\u003e\n\u003cli\u003e.927\" wrist pin diameter compatible with full-floating or press-fit configurations\u003c\/li\u003e\n\u003cli\u003eRing groove dimensions of 1.2mm top and second rings, with a 3mm oil ring groove for effective sealing\u003c\/li\u003e\n\u003cli\u003eDesigned for a 3.720\" stroke and 6.2\" connecting rods, matching factory and performance builds\u003c\/li\u003e\n\u003cli\u003eApproximate compression ratios tailored for different combustion chamber sizes: 65cc (9.88:1), 74cc (9.09:1), and 85cc (8.29:1)\u003c\/li\u003e\n\u003cli\u003ePrecision machining ensures consistent fitment and performance across all pistons in the set\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing FX Series pistons are forged from high-quality aluminum alloy, providing a lightweight yet robust component capable of withstanding the rigors of high-performance engines. The forging process enhances grain structure and mechanical properties, resulting in pistons that resist cracking and deformation under extreme heat and pressure.\u003c\/p\u003e\u003cp\u003eThe dish-top design with a -18cc volume helps manage compression ratios, making these pistons versatile for various tuning setups. The piston pin bore is engineered to accept either full-floating or press-fit pins, allowing flexibility depending on engine build preferences. Additionally, the ring grooves are precision-cut to accommodate standard ring sizes, ensuring optimal sealing and oil control.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram 6.4L 392 engines, specifically the 398 Small Block Mopar HEMI Gen III platform. Installation requires standard engine rebuilding procedures, including proper honing of the cylinder bore to 4.125\" and ensuring compatibility with the 3.720\" stroke crankshaft and 6.2\" connecting rods.\u003c\/p\u003e\u003cp\u003eDue to the precise engineering and OEM-compatible dimensions, these pistons typically install without the need for custom modifications. However, professional installation and careful measurement are recommended to achieve optimal piston-to-wall clearance and ring end gap settings.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eComplete set of forged pistons sized for 4.125\" bore\u003c\/li\u003e\n\u003cli\u003eCompatible with full-floating or press-fit wrist pins (pins not included)\u003c\/li\u003e\n\u003cli\u003ePrecision-machined ring grooves for standard piston rings\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is ideal for performance enthusiasts, engine builders, and professional tuners upgrading or rebuilding Chrysler, Dodge, Jeep, and Ram 6.4L 392 HEMI engines. Whether for street performance, track use, or mild racing applications, these forged pistons provide enhanced durability and reliability over stock components.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381007859924,"sku":"1-6845-4125C","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381007892692,"sku":"2-6845-4125C","price":719.95,"currency_code":"USD","in_stock":true},{"title":"FX-3 2618 Alloy with Lateral Gas Ports - XR .225 Wall Pin Upgrade - Spiro Locs \/ Pistons - Pins and Locs Without Rings","offer_id":47381007925460,"sku":"3-6845-4125C","price":899.95,"currency_code":"USD","in_stock":true},{"title":"FX-1 4032 Alloy \/ Pistons - Pins - Locs With DSS Racing Rings in a Kit","offer_id":47381007958228,"sku":"K1-6845-4125C","price":867.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins - Locs With DSS Racing Rings in a Kit","offer_id":47381007990996,"sku":"K2-6845-4125C","price":897.95,"currency_code":"USD","in_stock":true},{"title":"FX-3 2618 Alloy with Lateral Gas Ports - XR .225 Wall Pin Upgrade - Spiro Locs \/ Pistons - Pins - Locs With DSS Racing Rings in a Kit","offer_id":47381008023764,"sku":"K3-6845-4125C","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002102_4_18eef388-7dcb-44a4-bb1e-1a809afdb108.webp?v=1771667016","url":"https:\/\/fasthemis.com\/products\/6845-4125-392-6-4-small-block-mopar-hemi-gen-iii-fx-series-18cc-dish-top-gen-iii-hemi-forged-piston-set-4-125-inch-bore-pin-dia-0-927-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}